Rising seas are changing Hawaiʻi Island's anchialine pools, rare brackish ecosystems connected to the ocean and fed by groundwater. More than 400 occur on the Kona Coast, where they support endemic species including ʻōpae ʻula shrimp, yet stronger waves, invasive fish, wastewater runoff and coastal development are putting them under growing pressure. Hui Loko, a collective of 23 groups, is restoring and protecting the pools through actions such as removing invasive weeds and fish while building public awareness of their ecological and cultural importance.